Neutralizing-cell and axis-indicator.



G. H. PIXLBY. NEUTRALIZING DELL AND AXIS INDICATOR.

APPLIOATION FILED MAY 22, 1911.

Patented Jan. 16, 1912.

roLUMBlA PLANOGRAIH,

f UNITED CHARLES HENRY, HXL-EY, gFiiofiIidAGo, WOISgAssIen'oR TO 1?. A. HARDYa oolvrrnnx-n coaronnrron or ILLINOIS. a

nEUTn IzrNG-cE 'L Ann AXIS-INDICATOR.

Specification of Letters listen-t. Patented J an, 16,1912, i V

r A neatmn filed May 22, 1911. -Seriai1,No."628,707.

To all whom it may concern;

Be it known that I, CHARLES HENRY PrxLEY, a citizen ofthe United States, and a resident of Chicago, in thefcountyof Cook and State .of Illinois, vhave invented new and useful Neutralizing-Celland Axis Indicator, of which the following is'a'specific'ation. f f A L My invention relates to the provision of a frame or cell which shall have facilities for holding the lens to be examined either unmounted or'mounted as in eye-glasses or spectacles; which shall be so formed. asto facilitate the easy and accuratelocation of the diametrical axes of the lens with respect to the instrument; and which shall have provision for supportingtest lenses'in suit-able known relation to the lens under examination, wherebyjthe' strength of the lens and location of the :cylindricalaxes may be determined.

I effectuate the above objects by the device illustrated in the accompanying drawing, 1n wh1ch: V

Flgure 1 1s a frontelevatlon; Fig.2 1s a back or rear elevation; and Fig. 3 is acentral longitudinalsecti'on. 4

Similar reference numerals refer to similar parts throughout the several views.

The reference numeral 1 designates the front lens holding plate, the outline of which is the same as that usually given tospectacle or eye glass lenses, and whichis of the size of the largest of such lenses as are generally in use, so that the lens may be properly located in the instrument by placing the lens so that its periphery is .just in. line or parallel with the periphery of the plate. The

plate 1, is concaved'slightly from the rear so as to better accommodate a lens lofla dished A or toric form.

At opposite sides ofthe plate are pro vided cut away areas, 2', to accommodate the studs of a mounted lens, and in the center is the opening, 3, through which the 'lens is observed. About the central opening the plate is provided with scales, 4, in

7 degrees running from right to left above and from left to right below the horizontal 1,

axis.

its central of the arm 5, is riveted, or otherwise suit- From the central'portion of the lower I edge of the plate, 1,"extends a spring arm, 5, which has a slot, 6, longitudinally through portion. To the 'upperZportion:

ably secured, the central portion of 'a semicircular spring lens clip 7, the ends" of which extend upon each side. of the plateandhave transversely extending ears, 8, for securing a test lens. I

plate 1 which are substantially similar to Y the plate 1,? and'arm 5, except the plate ,1, is

. 1 A c0 Back of the plate, 1,-and arm, 5, and sej "cured to the lowerend ofsaid arm 5,by the rlvets, 9,;are the rearor back arm 5?, and

smaller than the platen, and the scales'l i are arrangedin the opposite order so that the reading will be the" same from which'{ ever side the instrument is observed. g

I have designated the portions of the back by similar. numerals employed for like portions of the front with the letter a added The unsecured ends of the arms 5 and 5 aresprung' outwardly or away from each other, and the double headed rivet l0 7 extends through" the slots 6 and 6 sothat by sliding the rivet 10 upwardly and down wardly ithe 'platesl and 1 are forced to,-

gether and permitted to separate in order 7 toengage. a lens betweenthe'm and-release it from engagement.

Thepl'ate 1? preferably of thesize of, i the smallest lens in generaluse so that the 1 smallest lens may be located by its periphery or any greater size may be brought parallel with the peripheriesof both plates.

- Itwillnowa be seen that a lens, either mounted or unmounted, may be easily loc'ated andsecured between the plates 1 and l, and that test lenses,inserted in the clips 7 and 7 ,may be rotated until theaction of the lens :is neutralized,w hen by noting th' strength, of "the testlenses and reading'their location .upon. the scales 4. and t y the' strength and location of the cylindrical axis of the lens are easily asoertained f Having'thus described my invention-,what

I claim as new and desire to secure by Let-; ters Patent, is :e v g 1. 'Adnejutralizing cell and axis indicator comprising vapair of lens holding disks,

oentralapertures therein, means for'secun ingsaid-disks in proximity, radial scales upon said disks about said apertures, .and spring lens clips extending laterally .fromsaid disks. v

accommodate a meniscus lens between them, central? apertures,thereln, spring arms extend ng therefrom, meansfor securmg. the

Q 12. Aipair or s holding di ks sha ed to:

remote ends of said spring arms, a slot in said arms, a double headed bolt in said slot whereby said arms may be brought together or released, central apertures in said disks and spring lens clips extending laterally from said disks.

3. A pair of lens holding disks of unequal diameters, the peripheries whereof are given the peripheral form of the usual lenses whereby lenses may be located between said disks by bringing their peripheries parallel With the edges of either or both of said disks, central apertures in said disks, means for securing said disks in proximity and spring lens clips extending laterally in front of said disks.

In testimony whereof I afiix my signature in the presence of tWo Witnesses.

CHARLES HENRY PIXLEY. Witnesses:

E. O. TRoEGnR, BENJ. T. RooDHoUsE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G." 

